The GCF is 9.
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The GCF is 3.
The Greatest Common Factor (GCF) of 144, 45, and 18 is 9.
The greatest common factor is 9 because 18 is divisible by 9 and so is 45. It can not be greaater than half of 18 and 45 is not divisible by 18.
The Greatest Common Factor (GCF) is: 1
The Greatest Common Factor of 36, 45, 54: 9